Measuring and testing – Center of gravity; turning moment; metacentric height
Patent
1990-06-20
1992-03-10
Ruehl, Charles A.
Measuring and testing
Center of gravity; turning moment; metacentric height
273 77A, G01M 138, A63B 5300
Patent
active
050941011
ABSTRACT:
A method for dynamically balancing a plurality of golf clubs wherein each club in the plurality of clubs is balanced to the same radius of gyration, the present method being based upon the dynamic equations describing compound pendulum motion and inlcudes the following steps: selecting a reference club having a predetermined shaft or equivalent pendulum length and an inherent radius of gyration; determining the radius of gyration of the reference club; determining the shaft or equivalent pendulum length of each club in the plurality of clubs; determining the new anticipated center of gravity location for each club in the plurality of clubs based upon the corresponding shaft or equivalent pendulum length of each such club and the radius of gyration for the reference club; and balancing each of such clubs at its respective new anticipated center of gravity location. The present method optimizes and improves the feel, comfortability, performance and control characteristics of a particular plurality of golf clubs and enables a golfer to more accurately match the individual clubs in a particular set or other club grouping to his/her particular needs and preferences thereby producing a noticeable improvement in the uniformity of feed and swing control experienced by such golfer. A tool for use in determining the center of gravity location of each club to be balanced based upon a predetermined radius of gyration and the shaft or equivalent pendulum length of each such club is also disclosed.
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patent: 4415156 (1983-11-01), Jorgensen
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